the last couple of times my boyfrirends fingered me ive been bleeding but it stops right after

hii,

k so, my boyfriend and i have been sexually active for the past 6 months, but a couple days ago he fingered me and i started to bleed but not very much blood at all so we didnt think much of it and just yesterday he was fingering me and i started to bleed but it was a good amount of blood, we thought maybe it was my period but it stoped right after, then the next morning he fingered me again and right after i went to the washroom and a small amount of blood came out but it wasnt red it was like a brownish red and it stoped right after, but there wasnt any pain or anything like that and he doesnt have any nails so it couldnt have been a cut..im really confused and scared about this..he thinks that it could be spotting and that i could maybe be pregnant because we have had unprotected sex before. can someone please answer this and try and help, im only 16 and too scared to talk to anyone about this.